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Square D KA26225 Molded Case Circuit Breaker
- 225A
- 2 Pole
- I-Line
Square D
KA26225
Molded Case Circuit Breaker
Brand
Square D
SKU
KA26225
Quantity
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Square D KA26225 - 225A 2 Pole Molded Case Circuit Breaker
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Description
Serving as a direct replacement for aging K-frame installations, the KA26225 is a 2-pole, 225A molded case circuit breaker. It provides reliable thermal-magnetic protection with fixed long-time and adjustable instantaneous trip functions for commercial power distribution. This breaker utilizes Square D's I-Line plug-on mounting system, allowing it to install into compatible I-Line panelboards. Rated to interrupt 25kA at 480VAC, it features standard load-side lugs and a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | KA26225 |
| Series | KA |
| Amperage | 225A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | K |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
7 answersWhat equipment is compatible with the KA26225 circuit breaker?
This breaker is designed specifically for Square D I-Line panelboards and switchboards. Because it utilizes a specialized plug-on bus connection, it cannot be used in standard load centers or unit-mount applications.
Is the Square D KA26225 a current production model?
No, the KA26225 is a legacy K-frame circuit breaker. It is primarily sourced to maintain and service existing infrastructure in older commercial distribution systems rather than for new construction.
What is the modern replacement for the legacy KA26225?
The KA26225 is officially replaced by the Square D PowerPact J-frame series. For a direct 225A, 2-pole I-Line replacement with equivalent interrupting ratings, the JGA262252 is the standard upgrade path.
What do the AB or AC suffixes indicate on KA26225 catalog numbers?
Suffixes such as AB or AC specify the phase connection configuration for the I-Line plug-on mounting. A KA26225AB connects to phases A and B, while a KA26225AC connects to phases A and C on the panelboard bus.
How is the KA26225 secured inside the panelboard?
The breaker utilizes Square D I-Line plug-on phase jaws that press directly onto the panelboard bus stack. It is then mechanically secured to the panel using a built-in mounting bracket, eliminating the need to bolt cables or busbars directly to the line side.
What does the LI trip function code mean for the KA26225?
The LI designation indicates that the thermal magnetic trip unit provides fixed Long-Time protection for thermal overloads and adjustable Instantaneous protection for short circuits.
Why does the KA26225 feature an adjustable magnetic trip?
The adjustable magnetic trip allows an installer to tune the instantaneous short-circuit response threshold. This flexibility is required for proper selective coordination with downstream breakers and other protective devices in the distribution system.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 14 reviews.
Total 5 star reviews: 13 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
14 reviews
- RFRon F.Verified BuyerReviewingSquare D KA36150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/27/26Square D KA36150
As usual, on time and in great condition!
- SJShawn J.Verified BuyerReviewingSquare D KA36225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/27/26I Line BreKER
Found exactly what I was looking for. They called and set over specs so I could confirm the fit!
- RFRon F.Verified BuyerReviewingSquare D KA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/9/26Multiple orders
I have purchased multiple breakers (of fairly large size) from SuperBreakers and their pricing has been excellent and the delivery time spot on. I would highly recommend them
- MFMatt F.Verified BuyerReviewingSquare D KA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/21/25Order Messed Up - Breaker Great
I have ordered many breakers through SuperBreakers with no issues until this order. I ordered this breaker and it wasn't shipped. I sent a message and was told that a mistake was make in shipping and that they would next day air the breaker to me. 5 days later (weekend in there) the breaker arrived. Not next day air, but shit happens. Sent the breaker still in the box out with my electrician and received a call from him that the breaker that was sent was a KAL36100 not the KA36100. I reached out to SuperBreakers and was told the correct breaker would be next day aired that day and I was emailed a shipping label to send back the incorrect one. This time it arrived the next day and was installed. This error cost my customer a couple days with out power to a dimmer cabinet and about 2 extra hours of labor, but all was okay in the end. Mistakes happen. The help and quick responses to my emails I received from Mike David showed me enough about this company. I look forward to my next order. Thank you for working this situation out in timely manor.
- JHJoel H.Verified BuyerReviewingSquare D KA36200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/25Worked As Planned
They had what we needed to match existing equipment, they shipped the same day and we put it right into service, no problems from first phone call to delivery and install.